Rig to Assembly

Converts the output of a Simulate into a reusable assembly library: breaks a simulated branch module into rigged instances that can decorate another tree.

Rig to Assembly turns the output of a Simulate into a reusable assembly library. Where the Assembly Resource prepares a library from imported geometry, Rig to Assembly takes a simulated Natsura module (a branch cluster grown and decorated in its own Simulate) and breaks it down into rigged instances that can be fed into an Assembly Decoration on another tree.

Brand new and likely to change. This tool landed recently and its controls are expected to evolve. Treat its parameter surface as unstable.

Inputs

Wire both outputs of the source Simulate into Rig to Assembly:

Geometry, the meshed/procedural output.
Rig, the skeleton produced at simulate time.

Both are required: the rig is what makes the resulting instances deformable and wind-ready downstream.

Outputs

Rig to Assembly shows a breakdown of the module:

The instances that make up the assembly.
A new instance representing the procedural geometry that was generated (as opposed to the prefab instances that came from an upstream assembly decoration).
The rigged output geometry.
Unique assemblies, each becomes a reusable assembly for the next simulation.
Individual instances, colour-coded so instances line up with where they sit inside the assembly.

The u value is encoded into the geometry (as in a simulation); this is what drives deformation in the downstream Assembly Decoration with respect to the hierarchy.

Validate by playing. Press play on the timeline. If the breakdown animates correctly, the assemblies are configured properly and will respond well to deformation in the Assembly Decoration and to wind in Unreal.

Parameters

Display

Parameter	Description
Display Rig	Show/hide the generated rig.
Pivots	Show the instance pivots.
Geometry	Toggle the geometry so you can inspect pivots and rig alone.
`u` value	Visualise the encoded `u` along the hierarchy.

Grouping

These controls build larger instances out of the small source instances, rather than only using the small parts:

Parameter	Description
Carve	Carve settings that generate new instances which are themselves assemblies of the source instances.
Fuse Threshold	Raise it to generate larger fused pieces; the small library is kept alongside the larger parts.
Max Modules	Upper bound on generated modules.
Min Length / Max Length	Length bounds used when generating modules.

Leaving the defaults keeps the original single-module breakdown.

Repeat

Defines a looping block in the graph. Encapsulates a subgraph between Repeat Begin and Repeat End, re-evaluating it N times with time-varying attributes.

Scan Material

Assigns a material to a scanned mesh. Used inside the high-poly import and graft workflows.